The Importance of High Temperatures in the Induction of the Resting Phase of Pinus Elliottii

Abstract

Whilst Vegis(1953, 1956) outlined the importance of high temperatures in the induction of a resting phase in plants, his findings have generally been overlooked. by forest physiologists, who usually regard day length as the most important parameter in the induction of the resting phase (see, for example, Kramer and Kozlowski 1960 and Longman 1969). Two recent experiments groWing seedlings of slash pine (Pinus eUiottii Engelm. var eUiottii L. & D.) in controlled environments have demonstrated the existence of a temperature X day length interaction in the induction of the resting phase and have shown the resting condition can be induced under constant day length by a change to a higher temperature regime.